DatabaseMysql.php

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<?php
class DatabaseMysql extends DatabaseMysqlBase {
    protected function doQuery( $sql ) {
        $conn = $this->getBindingHandle();

        if ( $this->bufferResults() ) {
            $ret = mysql_query( $sql, $conn );
        } else {
            $ret = mysql_unbuffered_query( $sql, $conn );
        }

        return $ret;
    }

    protected function mysqlConnect( $realServer ) {
        # Avoid a suppressed fatal error, which is very hard to track down
        if ( !extension_loaded( 'mysql' ) ) {
            throw new DBConnectionError(
                $this,
                "MySQL functions missing, have you compiled PHP with the --with-mysql option?\n"
            );
        }

        $connFlags = 0;
        if ( $this->mFlags & self::DBO_SSL ) {
            $connFlags |= MYSQL_CLIENT_SSL;
        }
        if ( $this->mFlags & self::DBO_COMPRESS ) {
            $connFlags |= MYSQL_CLIENT_COMPRESS;
        }

        if ( ini_get( 'mysql.connect_timeout' ) <= 3 ) {
            $numAttempts = 2;
        } else {
            $numAttempts = 1;
        }

        $conn = false;

        # The kernel's default SYN retransmission period is far too slow for us,
        # so we use a short timeout plus a manual retry. Retrying means that a small
        # but finite rate of SYN packet loss won't cause user-visible errors.
        for ( $i = 0; $i < $numAttempts && !$conn; $i++ ) {
            if ( $i > 1 ) {
                usleep( 1000 );
            }
            if ( $this->mFlags & self::DBO_PERSISTENT ) {
                $conn = mysql_pconnect( $realServer, $this->mUser, $this->mPassword, $connFlags );
            } else {
                # Create a new connection...
                $conn = mysql_connect( $realServer, $this->mUser, $this->mPassword, true, $connFlags );
            }
        }

        return $conn;
    }

    protected function mysqlSetCharset( $charset ) {
        $conn = $this->getBindingHandle();

        if ( function_exists( 'mysql_set_charset' ) ) {
            return mysql_set_charset( $charset, $conn );
        } else {
            return $this->query( 'SET NAMES ' . $charset, __METHOD__ );
        }
    }

    protected function closeConnection() {
        $conn = $this->getBindingHandle();

        return mysql_close( $conn );
    }

    function insertId() {
        $conn = $this->getBindingHandle();

        return mysql_insert_id( $conn );
    }

    function lastErrno() {
        if ( $this->mConn ) {
            return mysql_errno( $this->mConn );
        } else {
            return mysql_errno();
        }
    }

    function affectedRows() {
        $conn = $this->getBindingHandle();

        return mysql_affected_rows( $conn );
    }

    function selectDB( $db ) {
        $conn = $this->getBindingHandle();

        $this->mDBname = $db;

        return mysql_select_db( $db, $conn );
    }

    protected function mysqlFreeResult( $res ) {
        return mysql_free_result( $res );
    }

    protected function mysqlFetchObject( $res ) {
        return mysql_fetch_object( $res );
    }

    protected function mysqlFetchArray( $res ) {
        return mysql_fetch_array( $res );
    }

    protected function mysqlNumRows( $res ) {
        return mysql_num_rows( $res );
    }

    protected function mysqlNumFields( $res ) {
        return mysql_num_fields( $res );
    }

    protected function mysqlFetchField( $res, $n ) {
        return mysql_fetch_field( $res, $n );
    }

    protected function mysqlFieldName( $res, $n ) {
        return mysql_field_name( $res, $n );
    }

    protected function mysqlFieldType( $res, $n ) {
        return mysql_field_type( $res, $n );
    }

    protected function mysqlDataSeek( $res, $row ) {
        return mysql_data_seek( $res, $row );
    }

    protected function mysqlError( $conn = null ) {
        return ( $conn !== null ) ? mysql_error( $conn ) : mysql_error(); // avoid warning
    }

    protected function mysqlRealEscapeString( $s ) {
        $conn = $this->getBindingHandle();

        return mysql_real_escape_string( $s, $conn );
    }
}